Figure 4.

aSEM image of our FE set-up. The inset is the TEM image representative of the type
of fractal nanorods tested; the scale bar is 200 nm.bFE current curve obtained at a distance of 252 nm and the inset is the linear FN plot.cSchematic representation of the three-stage model. Thesolid linecorresponds to the first stage and so on